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*4x4k20* · 12-26-2000, 10:27 AM

anyone out there running vortec heads on a older eng. with carb. i have a 383 in my 79 3/4 ton 4x4 good strong eng but cant get it to stop pinging i run 93 octane timing at 12 with no vacum advance thats where it runs best with less pinging anybody else have this problem with your vortec head eng.

12-26-2000, 10:27 AM	#1
4x4k20 Account Suspended Join Date: Dec 2000 Location: williamson .ga .usa Posts: 46	vortec heads anyone out there running vortec heads on a older eng. with carb. i have a 383 in my 79 3/4 ton 4x4 good strong eng but cant get it to stop pinging i run 93 octane timing at 12 with no vacum advance thats where it runs best with less pinging anybody else have this problem with your vortec head eng.